BKF File Repair Software - Version 5.4 In case backup file shown error message like unable to restore BKF file, so don't worried then in this condition we feel hopeless to repair BKF file but due to invention of latest BKF file repair software resolves this type of BKF error message: “The backup file contains unrecognized data and cannot be used”. May be it happens due to Virus or some other reasons but, this time BKF file repair software helps you to regain this database. For accessing corrupted BKF files or resolving above mentioned error message you have to download BKF file repair software. Free version with complete features is available but it restricts you to extract recovered file. You can only view your recovered files but can't save it. It is recommended for you to use demo facility first so that, you can gain complete knowledge about software before investing in third-party BKF file repair software.